Home Task 4: Digital Systems Unit 4: Option 2 Unit 4: Option 2 By preserviceteachersa. Published on September 13, 2020. 0 A good YouTube video for middle/upper primary that can be used to guide them in ‘what not to use’ and methods for choosing strong passwords. Share this:TwitterFacebookLike this:Like Loading... + There are no comments Add yours Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.